Description of algorithm
Full domain
  Ice concntr, edge pos
  Contingency tables
American sector
European sector
Asian sector

Validation of sea ice concentration - Full domain

Bulletin date: 2023-10-12

Data source: OSI SAF N.H. AMSR sea ice concentration

Model vs. observations, sea ice class contingency tables

Date: 2023-10-06:

Best estimate Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 114431 15045 395 497 143 45 0 0
OW 1967 1444 392 1061 452 72 1 0
VODI 1909 524 166 578 868 275 7 0
ODI 0 168 105 334 625 527 38 0
CDI 0 82 80 368 903 1776 452 0
VCDI 0 3 3 78 412 7587 25120 1877
...date precedes bulletin

Date: 2023-10-08:

Best estimate Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 111570 15957 433 492 175 9 0 0
OW 1925 2019 403 910 582 29 0 0
VODI 1967 415 226 748 1178 269 1 0
ODI 0 144 75 329 642 697 20 0
CDI 0 95 64 316 608 1510 335 1
VCDI 0 7 6 62 255 5965 24790 5581
...date precedes bulletin

Date: 2023-10-10:

Best estimate Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 108357 18160 568 578 51 0 0 0
OW 1854 1095 458 1244 293 14 0 0
VODI 2057 131 146 1028 849 93 0 0
ODI 0 39 42 383 1036 262 5 0
CDI 0 18 30 140 1376 1801 318 0
VCDI 0 0 0 17 153 4518 25869 7827
...date precedes bulletin

Date: 2023-10-12:

Best estimate Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 109444 15745 478 500 45 0 0 0
OW 1835 1791 367 994 317 21 0 0
VODI 2114 317 195 909 947 109 4 0
ODI 0 112 54 306 887 375 14 0
CDI 0 45 58 172 1015 1830 359 0
VCDI 0 0 0 21 238 4861 20665 13666
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 109438 15994 523 607 79 0 0 0
OW 1838 1587 308 964 309 20 0 0
VODI 2117 286 203 832 963 133 3 0
ODI 0 100 65 278 952 405 18 0
CDI 0 43 53 206 902 2072 463 0
VCDI 0 0 0 15 244 4566 20558 13666

Date: 2023-10-14:

Best estimate Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 107746 16067 395 421 86 5 0 0
OW 1860 1594 416 974 565 84 0 0
VODI 2156 426 228 762 1196 346 35 0
ODI 0 129 77 234 726 594 22 0
CDI 0 83 75 284 768 1708 243 0
VCDI 0 7 16 97 466 5064 19488 15367
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 107757 16402 481 637 159 39 0 0
OW 1852 1336 350 797 518 89 3 0
VODI 2153 381 200 684 1196 347 38 0
ODI 0 109 83 240 716 629 17 0
CDI 0 67 75 289 719 1846 337 0
VCDI 0 11 18 125 499 4851 19393 15367

Date: 2023-10-16:

Best estimate Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 103877 18044 560 603 53 0 0 0
OW 1663 1577 432 664 196 6 0 0
VODI 2350 241 264 1091 890 75 3 0
ODI 0 51 38 392 1589 336 12 0
CDI 0 14 43 234 1412 3333 170 0
VCDI 0 0 0 51 352 4230 20005 15959
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 103879 17781 636 874 256 14 10 0
OW 1682 1289 297 623 559 151 13 0
VODI 2329 524 209 622 1434 559 34 0
ODI 0 208 79 281 765 1046 40 0
CDI 0 119 88 422 848 1957 921 0
VCDI 0 6 28 213 630 4253 19172 15959

Date: 2023-10-18:

Best estimate Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 99961 18069 773 1531 517 3 0 0
OW 1601 1382 537 1072 505 99 0 0
VODI 2413 237 185 768 992 236 5 0
ODI 0 51 39 237 1147 850 47 0
CDI 0 4 31 141 917 3034 877 0
VCDI 0 0 0 0 282 4539 19630 18098
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 99947 17693 842 1690 743 60 0 0
OW 1627 1140 331 841 771 261 13 0
VODI 2401 649 193 588 878 663 48 0
ODI 0 208 110 257 563 1456 206 0
CDI 0 52 87 309 728 1843 1221 0
VCDI 0 1 2 64 677 4478 19071 18098

Date: 2023-10-20:

Best estimate Forecast
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 99376 15643 775 843 547 12 0 0
OW 1545 1246 498 1109 1171 330 0 0
VODI 2478 340 227 940 1556 524 0 0
ODI 0 94 45 347 999 857 7 0
CDI 0 63 47 179 973 3448 614 0
VCDI 0 6 14 56 561 7710 25191 10439
observations
Ice free Ice free
near MIZ
OW VODI ODI CDI VCDI
near MIZ
VCDI
m
o
d
e
l
Ice free 99326 14661 824 1172 1055 111 0 0
OW 1594 1419 267 700 1241 421 0 0
VODI 2479 882 258 689 1127 881 12 0
ODI 0 258 131 427 696 1179 50 0
CDI 0 133 87 324 792 2780 741 0
VCDI 0 39 39 162 896 7509 25009 10439


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